/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2024 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */

/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */

/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/
UART_HandleTypeDef huart1;

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART1_UART_Init(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */

//////////////////////////// Drivers /////////////////////////////////////////////
////redirect printf
////must select build option: target-> use MicroLib 
#include <stdio.h>
int fputc(int ch, FILE* no_used)
{
	uint8_t c = (uint8_t)ch;
	HAL_UART_Transmit(&huart1, &c, sizeof(c), 10);
	
	return ch;
}

////SYS_LED
static void DRV_SysLedToggle()
{
	HAL_GPIO_TogglePin(SYS_LED_GPIO_Port, SYS_LED_Pin);
}

////POWER_1
static void DRV_Power1On()
{
	HAL_GPIO_WritePin(POWER_1_GPIO_Port, POWER_1_Pin, GPIO_PIN_RESET);
}
static void DRV_Power1Off()
{
	HAL_GPIO_WritePin(POWER_1_GPIO_Port, POWER_1_Pin, GPIO_PIN_SET);
}

////POWER_2
static void DRV_Power2On()
{
	HAL_GPIO_WritePin(POWER_2_GPIO_Port, POWER_2_Pin, GPIO_PIN_RESET);
}
static void DRV_Power2Off()
{
	HAL_GPIO_WritePin(POWER_2_GPIO_Port, POWER_2_Pin, GPIO_PIN_SET);
}

////POWER_RST
static void DRV_PowerResetOn()
{ 
	HAL_GPIO_WritePin(POWER_RST_GPIO_Port, POWER_RST_Pin, GPIO_PIN_SET);
}
static void DRV_PowerResetOff()
{
	HAL_GPIO_WritePin(POWER_RST_GPIO_Port, POWER_RST_Pin, GPIO_PIN_RESET);
}

#define LED_STATE_OFF		0
#define LED_STATE_ON		0xFF
//LED_LNK state
static int DRV_LedLinkState()
{
	int state = LED_STATE_OFF;
	if(GPIO_PIN_SET == HAL_GPIO_ReadPin(LED_LINK_GPIO_Port, LED_LINK_Pin) )
	{
		state = LED_STATE_ON;
	}
	
	return state;
}

/////////////////////////// Tools ////////////////////////////////////////////
static uint32_t DiffTick(uint32_t last)
{
	uint32_t current = HAL_GetTick();
	return current >= last ? (current - last) : (UINT32_MAX - (last - current));
}

///////////////////////// Logic ///////////////////////////////////////////////
#define SYS_LED_BLINK_T		1000 //1ms
#define STATE_POWER_OFF		0
#define STATE_POWER_RST		1
#define STATE_POWER_ON		2
#define POWER_OFF_T				100 //100ms
#define POWER_RST_T				100 //100ms
#define LED_LINK_OFF_T		60000 //60s

//// SYS_LED blink per 1s
static struct {
	uint32_t tick; //time since state changed
}g_sys_led = {0};
static void SysLedBlink()
{
	if(DiffTick(g_sys_led.tick) >= SYS_LED_BLINK_T)
	{
		printf("sys led blink\n");
		DRV_SysLedToggle();
		g_sys_led.tick = HAL_GetTick();
	}
}


//// states monitor
static struct {
	uint32_t tick; //time since state changed
	int state; //current state
} g_link = {0};
static void StateUpdate()
{
	int cur_state;
	
	cur_state = DRV_LedLinkState();
	if(cur_state != g_link.state)
	{
		g_link.state = cur_state;
		g_link.tick = HAL_GetTick();
	}
}

static struct {
	uint32_t tick; //time since state changed
	int state; // current state
} g_logic = {0};
static void Logic()
{	
	if(g_link.state == LED_STATE_OFF && DiffTick(g_link.tick) >= LED_LINK_OFF_T)
	{
		g_link.tick = HAL_GetTick();
		printf("power off\n");
		DRV_Power1Off();
		DRV_Power2Off();
		DRV_PowerResetOn();
		
		g_logic.state = STATE_POWER_OFF;
		g_logic.tick = HAL_GetTick();
	}		
	
	switch(g_logic.state)
	{
		case STATE_POWER_OFF:
			if(DiffTick(g_logic.tick) >= POWER_OFF_T)
			{
				printf("power reset\n");
				DRV_PowerResetOn();
				DRV_Power1On();
				DRV_Power2On();
				
				g_logic.state = STATE_POWER_RST;
				g_logic.tick = HAL_GetTick();
			}
			break;
		case STATE_POWER_RST:
			if(DiffTick(g_logic.tick) >= POWER_RST_T)
			{
				printf("power on\n");
				DRV_PowerResetOff();
				
				g_logic.state = STATE_POWER_ON;
				g_logic.tick = HAL_GetTick();
			}
			break;
		default:
			break;
	}
}
/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_USART1_UART_Init();
  /* USER CODE BEGIN 2 */
	
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
		SysLedBlink();
		StateUpdate();
		Logic();
  }
  /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Configure the main internal regulator output voltage
  */
  __HAL_RCC_PWR_CLK_ENABLE();
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLM = 6;
  RCC_OscInitStruct.PLL.PLLN = 72;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = 4;
  RCC_OscInitStruct.PLL.PLLR = 2;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  {
    Error_Handler();
  }
}

/**
  * @brief USART1 Initialization Function
  * @param None
  * @retval None
  */
static void MX_USART1_UART_Init(void)
{

  /* USER CODE BEGIN USART1_Init 0 */

  /* USER CODE END USART1_Init 0 */

  /* USER CODE BEGIN USART1_Init 1 */

  /* USER CODE END USART1_Init 1 */
  huart1.Instance = USART1;
  huart1.Init.BaudRate = 115200;
  huart1.Init.WordLength = UART_WORDLENGTH_8B;
  huart1.Init.StopBits = UART_STOPBITS_1;
  huart1.Init.Parity = UART_PARITY_NONE;
  huart1.Init.Mode = UART_MODE_TX_RX;
  huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart1.Init.OverSampling = UART_OVERSAMPLING_16;
  if (HAL_UART_Init(&huart1) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN USART1_Init 2 */

  /* USER CODE END USART1_Init 2 */

}

/**
  * @brief GPIO Initialization Function
  * @param None
  * @retval None
  */
static void MX_GPIO_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 */

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOH_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOA, POWER_2_Pin|POWER_1_Pin, GPIO_PIN_SET);

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOB, POWER_RST_Pin|SYS_LED_Pin, GPIO_PIN_SET);

  /*Configure GPIO pin : LED_LINK_Pin */
  GPIO_InitStruct.Pin = LED_LINK_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(LED_LINK_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pins : POWER_2_Pin POWER_1_Pin */
  GPIO_InitStruct.Pin = POWER_2_Pin|POWER_1_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /*Configure GPIO pins : POWER_RST_Pin SYS_LED_Pin */
  GPIO_InitStruct.Pin = POWER_RST_Pin|SYS_LED_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

/* USER CODE BEGIN MX_GPIO_Init_2 */
/* USER CODE END MX_GPIO_Init_2 */
}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */
  __disable_irq();
  while (1)
  {
  }
  /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
